Driving-wheel



J4. A. HAPNBR.

(No Model.)

v DRIVING WHEEL.

Patented Jan. 17. 18 8 2.

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@Mm/@Kl #4691/7 N. PETERS. Pnmuumpgmpher, wmngm". nc.

To all whom 'itmayconcern l tinnen STATES PATENT GFFICE.

' Joan A. HAFNER, ou` Pirrsuae, rnNNsYLVANiA;

DRIVING-WHEEL. y'

SPECIFICATION forming part of Letters Patent No, 252,457, dated January 17, 1882.

`: l Application filed December 19,1881. (Nopmodel.)

Be it known that I, JOHN A. HAFNER, of Pittsburg,in' the county ofAlleghenyand State ol" Pennsylvania, have invented a new and use.- ful Improvementin Driving-Wheels; and [do hereby declare the following to be a full, clear, 'and exact description thereof'.

' Heretofore the pulley, by means of whiclilthe power to drive the runner of apairof mill-stones wasobtained, has been keyed to the spindle of the ruimer.y One great objection to this construction has been that the spindle receives the sidel pull of' the belt, which causes it to wear s laterally upon the step in which its lower end is placed, and also to spring. The result is that the spindle is thrown out of perpendicular and the runner out of parallelism with the bedstone-that is, nearer to it at one edge than at the other. This affects the operation ot' the stones, causing them to grind imperfeetly, and inflictsfa serious loss on the miller.

"My invention is designed to `overcome this difficulty; and itconsists in making `the spindle independent ofthe pulley and supporting the pulleyin a bearing, which receives the side -pull of the belt and takes itoi' ofthe spindle,

which,bein g relieved therefrom, remains truly centered and does not tend toget outofalignv nient.

To. enable others skilled in the art to make and use my invention, I will now descri-beit by reference to the accompanying dra-wings,

in whichw Figure l is a vertical section of inyimprovement. Fig. 2 is a side view'ot' one part of the .clutch-coupling which serves to connect the pulley to the spindle.A Fig. 3 is aplan view of the pulley and an intermediate coupling-plate which I may use. Fig. et is a bottom view of the coupling-plate. Fig. 5 is a section on w a', Fig. 1.

Like letters of reference indicate like parts.

The lower endonly of the spindle ais shown. The runner is attached to the upperendmhich is not shown) in any known or desired way.

- The spindle a is stepped in a metallic block,b,

which rests upon alever,c. Thelevercis used for adjusting the runner with relation to the bed-stone, to make the mill grind line or coarse. This is done by raising and lowering thelever c. The block b is placed in a circular open in0r in the iullehbearinfr-d and is irovided with a packipgring to prevent the escupe ot' the lubricating-oil from the central cavity ot the-bearing. The bearing d hasl a hollow or tubular body, d, and a broad base, l-between which and the body d are wings or/braces d3.

In the sides ot the body d are recesses e, preferably three in number, and iu them/are iron centeringpieces or followers f, which are concave, as :ttf/,and filled or faced with Babbitt metal, glass, or other` suitable material, f3; or they may b e entirely composed of brass or suitable metal. The followers constitute the bearings ot' the pulley-hub in the hollow body d', and they are adjusted to it by set-screws f2, .which extend through the sides ofthe shell d. The pulley o has atubular hub, c', at'one end of which the arins o2 extend. The arms ozrun to the middle'oftheperiphery 03, and are curved downward, so as to bring` the middle of the -middle of the hub o. ofthe pulley are separate pieces, thearms ot' the wheel running `to a ring, 0*, and they are united by the screws or bolts o5 runnin g through the dange ofthe hub into the ring 04. It'- preferred, however, the pulley may. be made in one piece. The hollow oricenter ofthe hub o Yis of greater diameter than that of spindle a, so that the latter may be inserted, operated, and adjusted-verticallyin thehubwithoutcontact or interference with the' saure. The pulley o imparts its motion to the spindle a'through the medium of any driving device which will permit a slight lateral movement of the pulley, such as would be caused by the side pull ot' the belt and a perpendicularmovementofthe spindle in adjusting the stones vertically, with out interfering with the operation ot the pul- -ley or destroying the perpendicularity of the spindle. In the instance shown in the draw ings there are two lugs, g, on the ring o4 of the pulley.

Keyed on the spindle a is a circular plate, It, upon which are also two lugs, h. The lugs g and hare not opposite to but at the side of each other. Interposed between them is a sector-plate, fi, the wings t" ot' which are a little less than the distance between the lugs g and It. The plate t' has a center hole, 2, through which the spindle apasses, and a groove, i, in

periphery in the same horizontal plane as the u The hub o and the rest IOO - its lower face to let in the heads of the-screws o5. The wings fi extend between the sides ot' the lugs g and h', so that the lugs g bear on the back edges ot' the wings t" and the front edges of `the wings bear on the back edges of the lugs h. The wings are slightly' less in width than the space between the lugs to provide for slight inaccuracies in casting. This construction permits aslight lateral movement ofthe pulley without affecting the spindle and a slight vertical movement of the spindle without affecting the operation of the pulley, as the lugs can slip radially and axially on the edges t3 of the plate t' enough to compensate for such movement. Any other desired form ot' clutch device having this characteristic may be used.

To make .the vertical movement easier, I have inserted between the moving faces-say 'i3 and L-ot` the clutch friction-balls@ in suita ble concavities or slots, q, made in onev part, or partially in each. This permits the 'parts to mo've easily to the length of the slot q and aids in getting accuracy otl adjustment.

Therpulley and spindle are oiled as follows: An oil-cup, lo, is placed at the highestlevel the oil is to reach, and is connected to the shell d by a glass tube, le', and a pipe, k2. A hole or holes, a, through the hub o' admits the oil to the spindle and step. l Around the lower end ofthe hub is a plate, m, having sloping sides, to deflect any grit that may be in the oil and prevent it'entering the step and cutting the end of the spindle and the step. The oil and grit workunder the lower ends of the follow-y ers j', which are raised, as atf2, high enough for that purpose into the lower ends of the recesses e. The cylinder d is filled to the proper level through the oil-cup 7c. The height of the oil is to be seen in the glass tube 7c.

Changes may be made in my apparatus. For instance, the arms o2 need not be curved, but may extend at right angles from the upper edge of the pulley, and the middle ofl the periphery brought on, or nearly on, the same plane as the middle of the hub. If desired, any other suitable form ot' oiling apparatus may be used. The outer side of the hub o is dressed so as to turn easily in the followers. Instead of o being a pulley, it may be a gearwheel, if desired, the devices described being advantageously applicable thereto. lThe use of the friction-balls having a limited vertical movement is applicable to straight-toothed gear clutches generally.

What I claim as my invention, and desire to secure by Letters Patent, is-

l. A pulley having a tubular hub, arms extending laterally from one end ofthe hub, and a periphery the middle ot which is on, or nearly on, a level with the middle ot' the hub,sub stantially as and for the purposes described.

2. The combination of a pulley having a tubular hub, arms extending laterally at the upper edge, and a hollow bearing in which the hub may turn, substantially as and for the purpose described;

3. The combination of a pulley having a hollow hub,a spindle of less diameter than and operating inside of the hub, and a clutch dcvice connecting the hub and spindle, which permits a slight lateral movement of the pulley and a vertical movement ot the spindle, substantially as and for the purposes described.

4. The combination of the huh, the tubular bearing, and adjustable followers placed in the sides of the tubular bearing, substantially as and for the purposes described.

5. The combination of the tubular hub, the deflecting-'p'late placed on the hubstep, and an oil or grit channel leading away from the step to a suitable receptacle, substantially as and for the purposes described.

6. The combination of a vertical toothed clutch and a loose sector-plate placed between the two parts ofthe clutch, having wings slightly less in width than the distance between the clutch-teeth, substantially as and for the purposes described.

7. A gear-clutch having straight-sided teeth with friction-balls placed in axially-extending slots in the same, substantially as and for the purposes described. y

-In testimony whereof I have hereunto set .my hand this 16th day of December, A. D. 1881.

JOHN A. HAFNER.

Witnesses:

JNo. K. SMITH, JAMES H. PORTE. 

